Type 1Simulator without LCD screen without accessories Type 2Simulator without LCD screenwithaccessories Type 3simulator with LCD screen without accessories Type 4simulator with LCD screen and accessories Type 55-SAE-J1939 simulator Type 1 to type 4: Passenger car agreement only Type 5: J1939 protocol only,for commercial vehicle such as bus, truck NOTE: This OBD simulator is independently developed by the store for testing of connected car products, testing of HUD products, and developing and using in research institutes of universities. The hardware shields the ready status and completes the status data. It cannot be used in car inspection and other industries. Do not disturb the car inspection purpose! The car ECU or OBD simulator was developed by first-line automotive electronics engineers, simulating the standard car OBD communication protocol, and can be used in HUD head-up display industry, car networking industry, racing watch development company, etc. to do research and development, and replace real car OBD in the test phase. To achieve the same effect as in the actual vehicle test. Save the company's cycle and cost for developing automotive electronic products! Supported protocols: 1,ISO15765-4 11BIT 500k 2,ISO15765-4 11BIT 250k